1 /*- 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1980, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif /* not lint */ 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)whois.c 8.1 (Berkeley) 6/6/93"; 39 #endif /* not lint */ 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/types.h> 46 #include <sys/socket.h> 47 #include <sys/poll.h> 48 #include <netinet/in.h> 49 #include <arpa/inet.h> 50 #include <ctype.h> 51 #include <err.h> 52 #include <netdb.h> 53 #include <stdarg.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <sysexits.h> 58 #include <unistd.h> 59 #include <fcntl.h> 60 #include <errno.h> 61 62 #define ABUSEHOST "whois.abuse.net" 63 #define ANICHOST "whois.arin.net" 64 #define DENICHOST "whois.denic.de" 65 #define DKNICHOST "whois.dk-hostmaster.dk" 66 #define FNICHOST "whois.afrinic.net" 67 #define GNICHOST "whois.nic.gov" 68 #define IANAHOST "whois.iana.org" 69 #define INICHOST "whois.internic.net" 70 #define KNICHOST "whois.krnic.net" 71 #define LNICHOST "whois.lacnic.net" 72 #define MNICHOST "whois.ra.net" 73 #define PDBHOST "whois.peeringdb.com" 74 #define PNICHOST "whois.apnic.net" 75 #define QNICHOST_TAIL ".whois-servers.net" 76 #define RNICHOST "whois.ripe.net" 77 #define VNICHOST "whois.verisign-grs.com" 78 79 #define DEFAULT_PORT "whois" 80 81 #define WHOIS_RECURSE 0x01 82 #define WHOIS_QUICK 0x02 83 #define WHOIS_SPAM_ME 0x04 84 85 #define CHOPSPAM ">>> Last update of WHOIS database:" 86 87 #define ishost(h) (isalnum((unsigned char)h) || h == '.' || h == '-') 88 89 #define SCAN(p, end, check) \ 90 while ((p) < (end)) \ 91 if (check) ++(p); \ 92 else break 93 94 static struct { 95 const char *suffix, *server; 96 } whoiswhere[] = { 97 /* Various handles */ 98 { "-ARIN", ANICHOST }, 99 { "-NICAT", "at" QNICHOST_TAIL }, 100 { "-NORID", "no" QNICHOST_TAIL }, 101 { "-RIPE", RNICHOST }, 102 /* Nominet's whois server doesn't return referrals to JANET */ 103 { ".ac.uk", "ac.uk" QNICHOST_TAIL }, 104 { ".gov.uk", "ac.uk" QNICHOST_TAIL }, 105 { "", IANAHOST }, /* default */ 106 { NULL, NULL } /* safety belt */ 107 }; 108 109 #define WHOIS_REFERRAL(s) { s, sizeof(s) - 1 } 110 static struct { 111 const char *prefix; 112 size_t len; 113 } whois_referral[] = { 114 WHOIS_REFERRAL("whois:"), /* IANA */ 115 WHOIS_REFERRAL("Whois Server:"), 116 WHOIS_REFERRAL("Registrar WHOIS Server:"), /* corporatedomains.com */ 117 WHOIS_REFERRAL("ReferralServer: whois://"), /* ARIN */ 118 WHOIS_REFERRAL("descr: region. Please query"), /* AfriNIC */ 119 { NULL, 0 } 120 }; 121 122 static const char *actually_arin[] = { 123 "netname: ERX-NETBLOCK\n", /* APNIC */ 124 "netname: NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK\n", 125 NULL 126 }; 127 128 static const char *port = DEFAULT_PORT; 129 130 static const char *choose_server(char *); 131 static struct addrinfo *gethostinfo(char const *host, int exitnoname); 132 static void s_asprintf(char **ret, const char *format, ...) __printflike(2, 3); 133 static void usage(void); 134 static void whois(const char *, const char *, int); 135 136 int 137 main(int argc, char *argv[]) 138 { 139 const char *country, *host; 140 int ch, flags; 141 142 #ifdef SOCKS 143 SOCKSinit(argv[0]); 144 #endif 145 146 country = host = NULL; 147 flags = 0; 148 while ((ch = getopt(argc, argv, "aAbc:fgh:iIklmp:PQrRS")) != -1) { 149 switch (ch) { 150 case 'a': 151 host = ANICHOST; 152 break; 153 case 'A': 154 host = PNICHOST; 155 break; 156 case 'b': 157 host = ABUSEHOST; 158 break; 159 case 'c': 160 country = optarg; 161 break; 162 case 'f': 163 host = FNICHOST; 164 break; 165 case 'g': 166 host = GNICHOST; 167 break; 168 case 'h': 169 host = optarg; 170 break; 171 case 'i': 172 host = INICHOST; 173 break; 174 case 'I': 175 host = IANAHOST; 176 break; 177 case 'k': 178 host = KNICHOST; 179 break; 180 case 'l': 181 host = LNICHOST; 182 break; 183 case 'm': 184 host = MNICHOST; 185 break; 186 case 'p': 187 port = optarg; 188 break; 189 case 'P': 190 host = PDBHOST; 191 break; 192 case 'Q': 193 flags |= WHOIS_QUICK; 194 break; 195 case 'r': 196 host = RNICHOST; 197 break; 198 case 'R': 199 flags |= WHOIS_RECURSE; 200 break; 201 case 'S': 202 flags |= WHOIS_SPAM_ME; 203 break; 204 case '?': 205 default: 206 usage(); 207 /* NOTREACHED */ 208 } 209 } 210 argc -= optind; 211 argv += optind; 212 213 if (!argc || (country != NULL && host != NULL)) 214 usage(); 215 216 /* 217 * If no host or country is specified, rely on referrals from IANA. 218 */ 219 if (host == NULL && country == NULL) { 220 if ((host = getenv("WHOIS_SERVER")) == NULL && 221 (host = getenv("RA_SERVER")) == NULL) { 222 if (!(flags & WHOIS_QUICK)) 223 flags |= WHOIS_RECURSE; 224 } 225 } 226 while (argc-- > 0) { 227 if (country != NULL) { 228 char *qnichost; 229 s_asprintf(&qnichost, "%s%s", country, QNICHOST_TAIL); 230 whois(*argv, qnichost, flags); 231 free(qnichost); 232 } else 233 whois(*argv, host != NULL ? host : 234 choose_server(*argv), flags); 235 argv++; 236 } 237 exit(0); 238 } 239 240 static const char * 241 choose_server(char *domain) 242 { 243 size_t len = strlen(domain); 244 int i; 245 246 for (i = 0; whoiswhere[i].suffix != NULL; i++) { 247 size_t suffix_len = strlen(whoiswhere[i].suffix); 248 if (len > suffix_len && 249 strcasecmp(domain + len - suffix_len, 250 whoiswhere[i].suffix) == 0) 251 return (whoiswhere[i].server); 252 } 253 errx(EX_SOFTWARE, "no default whois server"); 254 } 255 256 static struct addrinfo * 257 gethostinfo(char const *host, int exit_on_noname) 258 { 259 struct addrinfo hints, *res; 260 int error; 261 262 memset(&hints, 0, sizeof(hints)); 263 hints.ai_flags = AI_CANONNAME; 264 hints.ai_family = AF_UNSPEC; 265 hints.ai_socktype = SOCK_STREAM; 266 res = NULL; 267 error = getaddrinfo(host, port, &hints, &res); 268 if (error && (exit_on_noname || error != EAI_NONAME)) 269 err(EX_NOHOST, "%s: %s", host, gai_strerror(error)); 270 return (res); 271 } 272 273 /* 274 * Wrapper for asprintf(3) that exits on error. 275 */ 276 static void 277 s_asprintf(char **ret, const char *format, ...) 278 { 279 va_list ap; 280 281 va_start(ap, format); 282 if (vasprintf(ret, format, ap) == -1) { 283 va_end(ap); 284 err(EX_OSERR, "vasprintf()"); 285 } 286 va_end(ap); 287 } 288 289 static int 290 connect_to_any_host(struct addrinfo *hostres) 291 { 292 struct addrinfo *res; 293 nfds_t i, j; 294 size_t count; 295 struct pollfd *fds; 296 int timeout = 180, s = -1; 297 298 for (res = hostres, count = 0; res; res = res->ai_next) 299 count++; 300 fds = calloc(count, sizeof(*fds)); 301 if (fds == NULL) 302 err(EX_OSERR, "calloc()"); 303 304 /* 305 * Traverse the result list elements and make non-block 306 * connection attempts. 307 */ 308 count = i = 0; 309 for (res = hostres; res != NULL; res = res->ai_next) { 310 s = socket(res->ai_family, res->ai_socktype | SOCK_NONBLOCK, 311 res->ai_protocol); 312 if (s < 0) 313 continue; 314 if (connect(s, res->ai_addr, res->ai_addrlen) < 0) { 315 if (errno == EINPROGRESS) { 316 /* Add the socket to poll list */ 317 fds[i].fd = s; 318 fds[i].events = POLLERR | POLLHUP | 319 POLLIN | POLLOUT; 320 /* 321 * From here until a socket connects, the 322 * socket fd is owned by the fds[] poll array. 323 */ 324 s = -1; 325 count++; 326 i++; 327 } else { 328 close(s); 329 s = -1; 330 331 /* 332 * Poll only if we have something to poll, 333 * otherwise just go ahead and try next 334 * address 335 */ 336 if (count == 0) 337 continue; 338 } 339 } else 340 goto done; 341 342 /* 343 * If we are at the last address, poll until a connection is 344 * established or we failed all connection attempts. 345 */ 346 if (res->ai_next == NULL) 347 timeout = INFTIM; 348 349 /* 350 * Poll the watched descriptors for successful connections: 351 * if we still have more untried resolved addresses, poll only 352 * once; otherwise, poll until all descriptors have errors, 353 * which will be considered as ETIMEDOUT later. 354 */ 355 do { 356 int n; 357 358 n = poll(fds, i, timeout); 359 if (n == 0) { 360 /* 361 * No event reported in time. Try with a 362 * smaller timeout (but cap at 2-3ms) 363 * after a new host have been added. 364 */ 365 if (timeout >= 3) 366 timeout >>= 1; 367 368 break; 369 } else if (n < 0) { 370 /* 371 * errno here can only be EINTR which we would 372 * want to clean up and bail out. 373 */ 374 s = -1; 375 goto done; 376 } 377 378 /* 379 * Check for the event(s) we have seen. 380 */ 381 for (j = 0; j < i; j++) { 382 if (fds[j].fd == -1 || fds[j].events == 0 || 383 fds[j].revents == 0) 384 continue; 385 if (fds[j].revents & ~(POLLIN | POLLOUT)) { 386 close(fds[j].fd); 387 fds[j].fd = -1; 388 fds[j].events = 0; 389 count--; 390 continue; 391 } else if (fds[j].revents & (POLLIN | POLLOUT)) { 392 /* Connect succeeded. */ 393 s = fds[j].fd; 394 fds[j].fd = -1; 395 396 goto done; 397 } 398 399 } 400 } while (timeout == INFTIM && count != 0); 401 } 402 403 /* All attempts were failed */ 404 s = -1; 405 if (count == 0) 406 errno = ETIMEDOUT; 407 408 done: 409 /* Close all watched fds except the succeeded one */ 410 for (j = 0; j < i; j++) 411 if (fds[j].fd != -1) 412 close(fds[j].fd); 413 free(fds); 414 return (s); 415 } 416 417 static void 418 whois(const char *query, const char *hostname, int flags) 419 { 420 FILE *fp; 421 struct addrinfo *hostres; 422 char *buf, *host, *nhost, *p; 423 int s, f; 424 size_t len, i; 425 426 hostres = gethostinfo(hostname, 1); 427 s = connect_to_any_host(hostres); 428 if (s == -1) 429 err(EX_OSERR, "connect()"); 430 431 /* Restore default blocking behavior. */ 432 if ((f = fcntl(s, F_GETFL)) == -1) 433 err(EX_OSERR, "fcntl()"); 434 f &= ~O_NONBLOCK; 435 if (fcntl(s, F_SETFL, f) == -1) 436 err(EX_OSERR, "fcntl()"); 437 438 fp = fdopen(s, "r+"); 439 if (fp == NULL) 440 err(EX_OSERR, "fdopen()"); 441 442 if (!(flags & WHOIS_SPAM_ME) && 443 (strcasecmp(hostname, DENICHOST) == 0 || 444 strcasecmp(hostname, "de" QNICHOST_TAIL) == 0)) { 445 const char *q; 446 int idn = 0; 447 for (q = query; *q != '\0'; q++) 448 if (!isascii(*q)) 449 idn = 1; 450 fprintf(fp, "-T dn%s %s\r\n", idn ? "" : ",ace", query); 451 } else if (!(flags & WHOIS_SPAM_ME) && 452 (strcasecmp(hostname, DKNICHOST) == 0 || 453 strcasecmp(hostname, "dk" QNICHOST_TAIL) == 0)) 454 fprintf(fp, "--show-handles %s\r\n", query); 455 else if ((flags & WHOIS_SPAM_ME) || 456 strchr(query, ' ') != NULL) 457 fprintf(fp, "%s\r\n", query); 458 else if (strcasecmp(hostname, ANICHOST) == 0) { 459 if (strncasecmp(query, "AS", 2) == 0 && 460 strspn(query+2, "0123456789") == strlen(query+2)) 461 fprintf(fp, "+ a %s\r\n", query+2); 462 else 463 fprintf(fp, "+ %s\r\n", query); 464 } else if (strcasecmp(hostres->ai_canonname, VNICHOST) == 0) 465 fprintf(fp, "domain %s\r\n", query); 466 else 467 fprintf(fp, "%s\r\n", query); 468 fflush(fp); 469 470 nhost = NULL; 471 while ((buf = fgetln(fp, &len)) != NULL) { 472 /* Nominet */ 473 if (!(flags & WHOIS_SPAM_ME) && 474 len == 5 && strncmp(buf, "-- \r\n", 5) == 0) 475 break; 476 477 printf("%.*s", (int)len, buf); 478 479 if ((flags & WHOIS_RECURSE) && nhost == NULL) { 480 for (i = 0; whois_referral[i].prefix != NULL; i++) { 481 p = buf; 482 SCAN(p, buf+len, *p == ' '); 483 if (strncasecmp(p, whois_referral[i].prefix, 484 whois_referral[i].len) != 0) 485 continue; 486 p += whois_referral[i].len; 487 SCAN(p, buf+len, *p == ' '); 488 host = p; 489 SCAN(p, buf+len, ishost(*p)); 490 /* avoid loops */ 491 if (strncmp(hostname, host, p - host) != 0) 492 s_asprintf(&nhost, "%.*s", 493 (int)(p - host), host); 494 break; 495 } 496 for (i = 0; actually_arin[i] != NULL; i++) { 497 if (strncmp(buf, actually_arin[i], len) == 0) { 498 s_asprintf(&nhost, "%s", ANICHOST); 499 break; 500 } 501 } 502 } 503 /* Verisign etc. */ 504 if (!(flags & WHOIS_SPAM_ME) && 505 len >= sizeof(CHOPSPAM)-1 && 506 (strncasecmp(buf, CHOPSPAM, sizeof(CHOPSPAM)-1) == 0 || 507 strncasecmp(buf, CHOPSPAM+4, sizeof(CHOPSPAM)-5) == 0)) { 508 printf("\n"); 509 break; 510 } 511 } 512 fclose(fp); 513 freeaddrinfo(hostres); 514 if (nhost != NULL) { 515 whois(query, nhost, flags); 516 free(nhost); 517 } 518 } 519 520 static void 521 usage(void) 522 { 523 fprintf(stderr, 524 "usage: whois [-aAbfgiIklmPQrRS] [-c country-code | -h hostname] " 525 "[-p port] name ...\n"); 526 exit(EX_USAGE); 527 } 528